Phosphorus-free scale and corrosion inhibitor using seawater as circulating cooling water and preparation method thereof

Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a non-phosphorus scale and corrosion inhibitor employing seawater as circulating cooling water and a preparation method thereof. The non-phosphorus scale and corrosion inhibitor is prepared from the following raw materials by weight percent: 2-6% of a mannich alkali quaternary ammonium salt, 5-20% of an aconitic acid-allyl sulfonate copolymer, 4-10% of a polyepoxysuccinic acid, 1-5% of a natural corrosion inhibitor, 5-15% of sodium gluconate, 3-5% of heptahydrate, 0.6-1.1% of BTA, and the balance of deionized water. The non-phosphorus scale and corrosion inhibitor has high scale and corrosion inhibitor performances, the problems of corrosion and scaling of the seawater as the circulating cooling water can be solved, and the non-phosphorus scale and corrosion inhibitor is especially suitable for various circulating water systems employing copper, carbon steel and stainless steel as materials, is free of phosphorus, and has good environmental protection property.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a phosphorus-free scale and corrosion inhibitor using seawater as circulating cooling water and a preparation method thereof. Background technique [0002] At present, my country's industrial water consumption accounts for more than 80% of the total water consumption, while the water consumption of thermal power plants accounts for about 20% of industrial water consumption. In order to save fresh water resources, some thermal power plants in my country's coastal areas began to use seawater as circulating cooling water, but because seawater is an electrolyte solution that can react with various substances, when seawater is used as circulating water, seawater is equivalent to electrolyte solution and metal It can form a battery to undergo electrochemical reactions, which can easily cause corrosion damage and failure of materials and equipment. Therefore, it is n...

AI Technical Summary

Problems solved by technology

However, the corrosion and scale inhibitors in the current market are mainly based on phosphorus-based formulas. For seawater with many types of microorganisms and high content, phosphorus-based formulas will promote excessive reproduction of microorganisms, especially algae, and cause seawater red tides

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